| 摘要 |
A connector shaped like a circular block having a circular top recess for mounting a male vertical frame rod, a circular bottom recess for mounting a female vertical frame rod, a center through hole communicated between the circular top recess and the circular bottom recess for allowing the screw rod section of the male vertical frame rod to pass and to be threaded into the screw hole on the female vertical frame rod, a plurality of radial holes for mounting a respective horizontal frame rod, and a plurality of countersunk holes around the circular top recess for mounting a respective screw bolt to hold down each horizontal frame rod in each radial hole.
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